Spindle and band adapted to be wound thereon



March 26,1940. MARCHEV ETAL 2,194,560

SPINDLE AND BAND ADAPTED TO BE WOUND THEREON .Filed June 19, 1937 2Sheets-Sheet 1 March 26, 1940. RCHEV A 2,194,560

1 SPINDLE AND BAND ADAPTED TO BE WOUND THEREON .F'Jiled June 19, 1937 2Sheets-Sheet 2 Patented Mar. 26, 1940 UNITED STATES SPINDLE AND BANDADAPTED TO BE WOUND THEREON Alfred Marchev, La Grange, and Henry I.Kcil, Chicago, Ill., assignors to Ditto, Incorporated,

Chicago, 111., a corporation of West Virginia Application June 19, 1937,Serial No. 149,074

4 Claims.

The invention relates to spindles and bands adapted to be wound thereonandis particularly adapted to be embodied. in spindles and hectographbands for hectograph duplicating machines. In duplicating machines ofthe hectograph type, the duplicating surface is preferably a coating ofgelatin applied to a sheet or band of fabthe spindle being cylindricaland being provided with at least one slot in its cylindrical surface,which slot extends diagonally or'rather, at a small angle to thelongitudinal axis of the spindle. Theband is provided with metallicclips or ends,

which clips are at a small angle to a line at right.-

5 hand is being removed'from the duplicating machine and there will besubstantially no danger that the metallic clip will be torn from theband. Other objects and advantages will become ap-.

parent as the following detailed description pro-v gresses, referencebeing had to the accompanying drawings, wherein- Fig. 1 is a sideelevation of the spindle which embodies the invention.

Fig. 2 is a section taken on line 2-'-'-2 of Fig. 1.

Fig. 3 is a fragmentary section taken on line 3-3 of Fig. 1. v

Fig. 4 is a fragmentary side elevation of the improved spindle showingthe improved band in section and applied to the spindle.

Fig. 5 is a section taken on line 5- 5 of Fig. 4.

Fig. 6 is a frag mentary section. taken through one end of the improvedband and a metallic clip secured to that end.

Fig. 7 is a somewhat diagrammatic longitudinal section taken through thehectograph duplieating apparatus which includes'the improved spindle andthe improved band, and

Fig. 8 is a side elevation of part of the apparatus shown in Fig. 7.

While the invention is disclosed in connection with duplicatingapparatus, it is to be understood that the invention is limited to thisuse only to the extent indicated in the appended claims.

' Referring to the drawings wherein a preferred embodiment of theinvention is illustrated, the

One form. of the invention is embodied in an 7 improved spindle and ahectograph band or roll,

reference character in designates generally a spindle which preferablycomprises a body POT! tion H formed of wood, the ends of the bodyportion H being provided with metallic caps l2 whereby the spindle maybe journalled in a dupli- I eating machine. The body portion H ispreferably cylindrical and is provided with two slots or grooves l5 andi6 which extend at small angles to the longitudinal axis of the'bodyportion H and intersect each other intermediate their ends so as toprovide two shoulders I! andI8 for a purpose hereinafter described. Itwill be noted thatuwhere the slots I5 and I5 intersect or cross eachother, the resulting single slot is wider at its ends than theindividual slots 15 and l6. 15 Adapted to be secured detachably to thespindle l0 and to be Wound thereon, is an improved hectograph band 20which comprises a layer of gelatin 2-! adhering to a backing band 22 ofpaper, 20

the ends of the paper band 22 being reenforced by metallic clips 23. Itwill be noted that each end of the paper backing 22 is folded back and aportion 24 of the clip 23 is disposed between the folded portion of thepaper backing and the unfolded portion. This construction assures thatthe clip 23 will not slip off of the end of the paper backing. At thesame time it provides a very thin clip which is advantageous fora reasonhereinafter set forth. Each of the metallic clips 23 has lugs 26 and 21struck outwardly from it intermediate its ends. The lug 26 is at oneside of the clip and the lugZ'l is at the other side of the clip. Thelugs 26 and 2'! are adapted to abut against the shoulders I! and I8 asbest illustrated in Fig. 4. In that figure, the clip is sectioned as ifit were a solid member, but this has been done in View of the smallscale to which the figure is drawn. In Figs. 4 and 5, the clip 23 isshown inserted in the slot it but if the band is reversed face for faceor is wound reversely on the spindle the clip will fit the same wayinthe slot I5. Such reversals are not contemplated as 7 being likely inconnection with hectograph machines but might be employed either in suchma 'chines or in other situations for which our arrangement is provided.It will be noted from Fig. 5 that the clip preferably is narrowerinwidth than thejdepth of the slot or groove so that it doesv not'extendabove the cylindrical surface of the body portion 1| i.

As best illustrated in Fig. 8', the clip 23 is not attached to theend ofthe band 20 at right angles tothe side edges of the band. Instead, theclip 23 is attached to the band at a small angle to any line extendingat right angles to the side edges'of the band. The angle which the clip23 makes with a line extending at right angles to i the side edges ofthe band 20 is substantially equal to the angle which each of the slotsl5 and I6 0 makes with the longitudinal axis of the body portion II.

In Fig. 7, a section is shown through duplicating apparatus whichincludes a duplicating drum 30' rotatably mounted in a frame (notshown). The spindle II] is rotatably journalled in the end walls of thedrum 30 and a second spindle lila is likewise journalled in the endwalls of the drum 30. The spindles l and Illa. are identical inconstruction. The band 20 is shown partly wound around the spindle N),the clip 23 at one end of the band being inserted in one of the slots Hor it. The other end of the band is shown in a position adjacentmechanism. 32 for stripping copy sheets from the gelatin band when themachine is in operation. The band 20 is shown at ,an intermediateposition through which it moves in its application to the machine. Whenthe duplicating machine is in operation, the clip shown adjacent thestripping mechanism 32 is held in one of the slots of the spindle Ma andthe band is partially wound on the spindle. This construction enablesthe operator to advance the band from the spindle Illa. to the spindleI0 by suitable mechanism (not shown). However, when the band 29 has beenunwound from the spindle Illa, it is usually replaced with another band,and for this reason it is wound entirely upon the spindle I0 before itis removed from the drum 38.

It will be noted that the stripping mechanism comprises rollers 35, 36and 31. The roller B'lis carried by brackets 38 pivoted upon a shaft 39.When the duplicating apparatus is in operation, the roller 3'! enters anopening in the drum 3!] once during each cycle of operation to interceptthe leading edge of a copy sheet and swings this edge out of the openingand toward the bight of the rollers 35 and 36, which rollers strip thecopy sheet from the band 2!]. It will be readily understood that theroller 31 must make its movements in a very small period of time asotherwise it will be necessary to leave relatively long unused marginson the leading edges of the copy sheets. It will also be understood thatdue to the speed at which the roller ,3! moves inwardly and outwardlywith respect to the drum 30 its weight should be small to preventvibration, etc., and its diameter should also be small to make thedistance through which it oscillates as small as possible. It is alsonecessary that the outermost position of the roller 31 with respect tothe drum 30 should be as close as possible to the drum to make thedistance through which the roller oscillates as small as possible.Heretofore, when bands employing clips having outstanding flanges wereemployed, the roller 31 would oftentimes tear the clips from the paperbacking while the band was being wound around the spindle I0.

Also, when thin clips were used without outstanding flanges, the clipswould become bent and would not pass readily between the outer surfaceof the drum 3i! and the roller 31. This sometimes resulted in injury tothe band as the roller 31 would tear the clips from the bands.

In Fig. 8, the clip 23 at one end of the band 29 is shown passingbetween the drum-3t and tice, it has been found that one may draw theclip 23 quickly through the space between the roller 3'! and the drum 30with very little danger that there will be any tearing of the paperbackmg.

While we have shown and described certain embodiments of our invention,it is to be understood that it is capable of many modifications.Changes, therefore, in the construction and arrangement may be madewithout departing from the spirit and scope of the invention asdisclosed in the appended claims, in which it is our intention to claimall novelty inherent in our invention as broadly as permissible, in Viewof the prior art.

We claim:

1. A spindle comprising a cylindrical body portion having twointersecting slots in its cylindrical surface at an acute angle to eachother providing a widened groove portion at thepoint of intersectionhaving shoulders adapted to engage projections on. the end of a bandinserted into one of said slots for holding the band from movementlongitudinally of the spindle, said slots extending at acute angles tothe longitudinal axis of said body portion.

2. A spindle of the type described, comprising a cylindrical bodyportion having a slot in its surface from about one end of the spindleto the other end and positioned at a slight angle from 1e axis of thespindle and adapted to receive the end portion of a band for connectionof the band to the spindle, said spindle having a second slot in itssurface intersecting said first named slot at a slight angle thereto soas to'provide a widened slot portion at the point ofintersection,shoulders extending in substantially radial direction being provided atopposite end portions of said widened slot portion adapted by engagementwith projections on the end portion of said band to hold the band fromlateral movement longitudinally of the spindle.

3. As a new article ofv manufacture, a cylindrical spindle having a deepgroove therein from about one end of the spindle to the other end andpositioned at a slight angle from the axis of the spindle with themiddle portion of the groove longitudinally thereof disposed insubstantially radial position, said spindle having a second groovetherein intersecting said first named groove at a slight angle theretoso as to provide a widened groove portion at the point of intersection,with shoulders at the ends of said widened groove portion extending insubstantially radial direction so as to engage projections on the end ofa band inserted into said deep groove for holding the band from movementlongitudinally of the spindle.

4. The combination of a spindle comprising a cylindrical body portionhaving two intersecting slots in its cylindrical surface, said slotsextending at acute angles to the longitudinal axis of said body portionand forming opposing shoulders at their intersection, and a band adaptedto be wound around said body portion in aligned convolutions and havinga clip adapted to seat in either of said slots, said clip havingprojections to abut against said shoulders to hold the clip in apredetermined position in the slot and said clip being attached to oneend of the band at an acute angle to a line extending at right angles tothe side edges of the band.

ALFRED MARCHEV. HENRY P. KEIL.

